Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979newsc..83..217s&link_type=abstract
New Scientist, vol. 83, July 19, 1979, p. 217-220.
Astronomy and Astrophysics
Astronomy
Galilean Satellites, Jupiter (Planet), Space Exploration, Voyager 1977 Mission, Amalthea, Astronomical Photography, Callisto, Ganymede, Planetary Surfaces, Voyager 2 Spacecraft, Jupiter, Satellites, Voyager, Review, Ganymede, Io, Callisto, Surface Features, Photography
Scientific paper
The preliminary findings of NASA's Voyager 1 and 2 inspection of Jupiter are surveyed. Photographs of Jupiter and its moons are presented showing the 4 billion year old cratered surface of Calliato and the smooth, apparently ice covered, surface of Europa. Attention is given to Io which is the most volcanically active body yet found in the solar system, giving it a relatively young surface. Sulfur from these volcanos is believed to cause the moon's red and orange coloring. Ganymede, the largest of the Galilean satellites, is discussed noting its two distinct surfaces and its density of only 1.9 gm per cu cm suggesting a large composition of water. White spots on Jupiter have been seen to be anticyclones, essentially similar to the Great Red Spot. The Jovian atmosphere is shown to have methane, ethene, and ethane along with ammonia, water and phosphine, in addition to mainly hydrogen. In addition, lightning and enormous auroral arcs were found on the dark side of Jupiter.
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